The road to HAMR

Challener, William A.; Peng, Chao; Itagi, A. V.; Karns, Duane; Peng, Yingguo; Yang, Xuehua; Zhu, Xiaobin; Gokemeijer, N. J.; Hsia, Yiao-Tee; Ju, Ganping; Rottmayer, R.; Seigler, Michael A.; Gage, Edward C.

doi:10.1109/apmrc.2009.4925388

Cited by 89 publications

(102 citation statements)

References 5 publications

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“…The temperature dependence of the SP resonance is important because of the recent applications of noble metal nanoparticles to the thermally assisted magnetic recording [23], thermal cancer treatment [16,[24][25][26] catalysis and nanostructure growth [27], and computer chips [28]. However, the SP temperature dependence was not studied in detail to date, because a broad temperature interval requires a usage of materials with high thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of the surface plasmon resonance in gold nanoparticles

et al. 2013

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The temperature dependences of the energy and the width of a surface plasmon resonance are studied for copper nanoparticles 17-59 nm in size in the silica host matrix in the temperature interval 293-460 K. An increase of the temperature leads to the red shift and the broadening of the surface plasmon resonance in Cu nanoparticles. The obtained dependences are analyzed within the framework of a theoretical model considering the thermal expansion of a nanoparticle, the electron-phonon scattering in a nanoparticle, and the temperature dependence of the dielectric permittivity of the host matrix. The thermal expansion is shown to be the main mechanism responsible for the temperature-induced red shift of the surface plasmon resonance in copper nanoparticles. The thermal volume expansion coefficient for Cu nanoparticles is found to be size-independent in the studied size range. Meanwhile, the increase of the electron-phonon scattering rate with the temperature is shown to be the dominant mechanism of the surface plasmon resonance broadening in copper nanoparticles.K e y w o r d s: surface plasmon resonance, copper nanoparticles, temperature-induced effects

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Section: Introductionmentioning

confidence: 99%

Temperature dependence of the surface plasmon resonance in gold nanoparticles

et al. 2013

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“…1 The ability to locally heat at the nanoscale opens the path for new promising achievements in Nanotechnology and especially for nanoscale control of temperature distribution, 2 chemical reactions, 3 phase transition, 4 material growth, 5 photothermal cancer therapy [6][7][8] and drug release.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond-pulsed optical heating of gold nanoparticles

2011

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We investigate theoretically and numerically the thermodynamics of gold nanoparticles immersed in water and illuminated by a femtosecond-pulsed laser at their plasmonic resonance. The spatiotemporal evolution of the temperature profile inside and outside is computed using a numerical framework based on a Runge-Kutta algorithm of the fourth order. The aim is to provide a comprehensive description of the physics of heat release of plasmonic nanoparticles under pulsed illumination, along with a simple and powerful numerical algorithm. In particular, we investigate the amplitude of the initial instantaneous temperature increase, the physical differences between pulsed and cw illuminations, the time scales governing the heat release into the surroundings, the spatial extension of the temperature distribution in the surrounding medium, the influence of a finite thermal conductivity of the gold/water interface, the influence of the pulse repetition rate of the laser, the validity of the uniform temperature approximation in the metal nanoparticle, and the optimum nanoparticle size (around 40nm) to achieve maximum temperature increase.

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“…Plasmons driven along the Au-dielectric interface generate heat in the Au, which must be dissipated across the interface and into the surrounding dielectric [16]. Low G across the Au-dielectric interface is a major source of thermal resistance within the device and therefore amplifies the temperature rise in the Au NFT leading to structural and thermal instability [16]. In this and other plasmonic applications, the thermal properties and the plasmonic/optical properties of the metal-dielectric interface must be balanced to optimize performance.…”

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confidence: 99%

“…For example, in heat-assisted magnetic recording (HAMR), a promising next generation data storage technology [15], a gold (Au) near field transducer (NFT) is used to generate plasmons that locally heat regions of the magnetic media [16,17]. Plasmons driven along the Au-dielectric interface generate heat in the Au, which must be dissipated across the interface and into the surrounding dielectric [16]. Low G across the Au-dielectric interface is a major source of thermal resistance within the device and therefore amplifies the temperature rise in the Au NFT leading to structural and thermal instability [16].…”

mentioning

confidence: 99%